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Inaccurate economic data.
Conflicting policy objectives.
Selecting the right policy instrument: Every macroeconomic objective requires a take apart policy instrument: The usual 'rule of thumb' is that one main policy instrument should be assign to one policy objective. Thus, for example, interest rates may be assigned as the main instrument for maintenance control of inflation, even as fiscal policy instruments such as change to the tax system strength are to be paid to achieve a quantity of supply-side objectives such as mounting the labor supply, boost incentive, and raise outlay and escalating production. At hand are quite deep-seated disagreement flanked by some economists as to which policies are most effectual to meet a convinced objective
Uncertain time lags when running a policy: change in economic policies are subject to unsure time lags e.g. a change in interest rates is predictable to take some 18-24 months to work its method entirely during the entire economy to strain through to a change in prices. The length of the time lags can change in excess of years as the reaction of consumers and businesses to policy actions alter
External shocks.
Kavungya answered the question on April 30, 2019 at 11:08